A tissue is an aggregation of cells that are similar in structure and function to perform a specific function. Intercellular substance and fibres are the non-living parts of a tissue. In between the cells is the intercellular substance, produced by the cells themselves. The intercellular substance generally consists of a homogenous ground substance or matrix. Fibres are embedded […]
Horse The skin is thinner than the ox. Sweat glands are well developed. The dorsal border of wither, neck and forehead presents long hairs. This is the mane of the horse. The tail bears long hairs, typical to the species. The hoof is a horny box, which encloses a number of sensitive cartilaginous and bony structures, etc., It consists of three
SKIN The skin or the common integument is the protective covering of the body and is continuous at the natural orifices with the mucous membranes of digestive, respiratory and urinogential tracts. It acts as a sense organ concerned with the reception of pain, temperature (warmth and cold), touch (coarse touch and tactile) and pressure sensations.
The tongue is the organ of taste. It owes this property to the taste buds, which are situated in the foliate, fungiform and vallate papillae in the mucouse membrane of the tongue, the oral face of epiglottis and anterior pillars of soft palate. The taste buds are oval flask shaped masses, which occupy the recesses
The sense of smell is carried through the olfactory nerve, which is distributed on the nasal mucous membrane and covers the upper-fourth of the turbinate bones, septum nasi, nasal meatuses and ethmoidal cells called olfactory area. This part of the mucous membrane is pale-yellow in colour and is lined by epithelial cells. The epithelium is
The walls of the membranous labyrinth are made up of outer thin tunica propria and an inner lining epithelium. The tunica propria is composed of delicate fibrous tissue and stellate fibroblasts. The epithelium of the membranous labyrinth is a single layer of flat squamous cells resting on a basement membrane. In certain regions, the wall
Microscopic Structure of Membranous labyrinth of ear Read More »
Membranous Labyrinth of ear consists of a series of interconnected sacs and ducts lying within the osseous labyrinth. The membranous labyrinth has nearly the same general form as the osseous part but does not fill it completely, being considerably smaller in diameter. It is separated from the wall of bony labyrinth and is surrounded by
The osseous labyrinth is excavated in the petrous part of the petrous temporal bone, medial to the tympanic cavity. It consists of three parts -a middle vestibule, an anterior cochlea and posterior semicircular canals. The vestibule with the cochlea in front and semicircular canals behind. It is 5 to 6 mm. long. Its lateral wall separates it from the tympanic cavity and in it are
Internal Ear is the essential part of the organ of hearing and receives peripheral ramifications of the auditory nerve. It is also called as labyrinth due to its complexity of its shape. It consists of two parts, a complex membranous sac containing neuroepithelium filled with a fluid endolymph, the membranous labyrinth a series of cavities
The middle ear comprises the tympanic cavity or tympanum with its contents and the eustachian tubes. The tympanum is the cavity excavated in the bulla tympanica of the petrous temporal bone. It is situated between the tympanic membrane and internal ear. It is a laterally com- pressed air cavity lined by mucous membrane and communicates
